基于改进电流平均值法的谐波检测技术研究

Research on harmonic detection technology based on the improved current average method

针对现阶段电力系统谐波检测无法同时满足快速动态响应和高精度检索的问题,本文分析了传统法i_p-i_q法和电流平均值法存在的缺点,提出了将电流平均模块与滤波器串联来代替原有滤波器的改进算法.仿真结果表明,采用改进电流平均值算法能实时检测和补偿负载谐波电流,在保证良好滤波效果的情况下,提高了响应速度和检测精度,能准确地检测出谐波电流,可满足对电能质量高精度检测的需求.

As the dynamic response performance and accuracy are not able to be satisfied simultaneously in present power system,the disadvantages of the traditional ip-iq method and the disadvantages of current average method are analyzed.The current average module is in series connection with filters to replace the original filter algorithm.The simulation results show that the improved current average algorithm detects and compensates load harmonic current in real-time.Thus,the dynamic response performance and accuracy are improved in the case of guaranteeing good filtering effect,which will meet the demand for high precision detection of power quality.